Improvement in cooling millstones and cues



k@tinnitus @anni @fitte JOHN MALLIN,` or BEDFORD, ortie.

l Letters Patent No. 72,744, dated December 31, 1867.

IMPROVEMENT IN COOLING MILLSTONES AND CURB.

tite rlgstul nfsmt tu im there tter @mit mit making gint nt tte same.

TO .ALL lWHOM IT MAY GONGERN:

Be it known that I, JOHN MALLIN, of Bedford, in the county of Cuyahoga,and State of Ohio, have invented certain new and useful Improvements inCooling Millstones and Curb; and I do hereby declare that the following`is a full and complete description of the same, reference being had tothe accompanying drawings, making part of this specification, in which-'i Figure 1 is a. perspective view of the stone-curb.

' Figure 2 is a top view with curb off.

Figure 3, a transverse section.

Like letters of reference' refer to like parts in the different viewspresented.

The nature of this invention consists 'of an induction of a current ofcold air into or between thc periphery ofthe stone and curb, and therebyprevent the accumulation of moisture on the inside ofthe curb,denominated by millers as sweating, whereby the iour becomes wetandvpasty, sticks to the curb, and'obstructs the escaping of the ilour,unless frequently' cleared out, and which it also damages. In order toobviate this diiiiculty, the following device is adopted, viz: v p

In iig. 3, A B represent the millstones, enclosed in the curb C, allofmwhich is or may be'construeted and arranged in the ordinary way. Inthe side of the curb are cut ventilators or openings, DIE, one near thebottom, and the other near the top. These openings are provided withaslide, F, -whereby the size of the openings may be regulated for apurpose hereafter shown. G, iig. 2, is a dinphragm','placed between thecurb and stone, in the position as shown in fig.` 3. This leather is'attached to the curb, and projects forward toward the'stone, againstwhich it slightly rubs', and,- as will be observed, is placed betweenthe two openings, as indicated bythe dotted line a, fig. 1. H, iig. 1,is n. fan-blower, I, thc pipeof which is'lprojected through the top ofthe curb,

and descends into the space, J, between the stones and curb, as seen infig. 3.

Having thus described the construction and arrangement of the device,thc practical operation of the same is as follows: The stone, while inmotion, induces a current ofcold air through the opening D, which passesaround the stone, andvcscapcs lfrom the curb through the opening E,which'is on the opposite side of the leather G, and also escapes, alongwith the Hour, from the opening K. In connection with the induction ofthis induced currentvof air is an mpelled one by the fan H, andconducted into the curb by means of the pipe I, the said blower beingdriven by a belt from the damsel or after-run, as may be convenient.

By the induction of` these tw'o cold .currents of air, the moisturearising from'the ilour is carried off, and, as a consequence, thetemperature of the stone reduced, se that the flour is not liabletobccomo heated and wet, as no sweat or moisture will be deposited onthe sides of the curb, and thus cause a pasty condition of the flour,and a sticking of the same to the sides of the curb.

'The strength or volume of the'induced currentof air admitted into thecurb is regulated by the slides F, which may be more or less closed, asthe nature of the case may demand; also, a valve being introduced intothe pipe I, the impelled current from`the fan can be regulatedns may berequired.

What I claim as my improvement, and desire to secure by Letters Patent,is-

The openings E D, diaphragm G, and fan H, all combined and arranged asand for the purpose set forth.

JOHN MALLIN. Witnesses:

J. H. Bunnies, E. E. WAITE.

